🛡️ CVE-2023-42366 — busybox

🟡 CVSS 5.5 — Medium ⚠️ Exploit Public CWE-787 NVD
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

A heap-buffer-overflow was discovered in BusyBox v.1.36.1 in the next_token function at awk.c:1159.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2023-42366 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.

Affected software

CVE-2023-42366 is recorded against 1 package.

  • busybox

Timeline and source

Published on 27 November 2023 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

bugs.busybox.net
bugs.busybox.net
security.netapp.com

CVE-2023-42366 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE CWE-787
Public Exploit ⚠️ Yes
Source NVD
Published 2023-11-27
Updated 2026-08-11
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
busybox — —

Exploit Protection

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CVE-2023-42366 carries CVSS 5.5 Medium rating and a public exploit already exists. BotEraser checks your installation against this and other known CVE records, and blocks IPs associated with exploit activity.

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